Rearward wash basin comprising a neck seal

ABSTRACT

The invention relates to a rearward wash basin ( 1 ) comprising a neck cutout ( 5 ) for performing a rearward head or hair washing, whereby the area of the neck cutout ( 5 ) is lined with a flexible neck seal ( 6 ). The neck seal ( 6 ) has a hollow chamber ( 7 ) and is provided in the form of bellows ( 8 ). The folds ( 9 ) have a curvature that essentially corresponds to that of the neck cutout ( 5 ).

[0001] The present invention relates to a rearward wash basin according to the general class of the preamble of claim 1.

[0002] Wash basins made of porcelain, metal or plastic for head or hair washing that are typically used in hairdressing salons are common around the world. To use them, the rearward part of the neck below the head is placed in a neck cutout provided for this purpose. The washing procedure is often uncomfortable or even painful for a salon customer, due to:

[0003] Placement of the cervical spine against a hard surface.

[0004] Sensation of pressure caused by a poor-fitting neck cutout in the wash basin.

[0005] Unpleasant sensation caused by the cold material of the rearward wash basin.

[0006] Water running along the back of the neck and into the clothing, caused by leakage in a neck cutout.

[0007] Although EP 0 103 112 A1, which represents the general class of claim 1, is known, the sealing ability of the flexible neck seal is not adequate for providing a fluid-tight fit for every neck size. The inadequate sealing ability is due to inadequate conformation to the neck. Optimum conformation to the neck is also prevented by the fact that said rearward wash basin has already been designed with an optimized neck cutout in a porcelain basin, and this neck cutout is made even tighter when the neck seal is installed.

[0008] The object of the present invention is to provide a rearward wash basin that is equivalent to the general class, but does not have the disadvantages listed hereinabove. In particular, an optimum and comfortable, fluid-tight seal between a customer's unique neck and a neck seal on a rearward wash basin will be provided that has no disadvantages for the customer.

[0009] This object is attained according to the characterizing part of claim 1. Further advantageous developments of the invention are based on the subclaims.

[0010] The invention will be explained in greater detail with reference to three exemplary embodiments.

[0011]FIG. 1 shows a top view of a rearward wash basin with a neck seal, as a first exemplary embodiment;

[0012]FIG. 2 shows the rearward wash basin in FIG. 1 in a side view along a partial cut II-II according to FIG. 1;

[0013]FIG. 3 shows the neck seal in a detained view “X” according to FIG. 2;

[0014]FIG. 4 shows a rearward wash basin with a neck seal in a top view, as a second exemplary embodiment;

[0015]FIG. 5 shows the rearward wash basin in FIG. 4 with a neck seal capable of being filled with air, in a side view along a partial cut V-V according to FIG. 4;

[0016]FIG. 6 shows the neck seal in FIG. 4, in a detained view “Y” according to FIG. 4;

[0017]FIG. 7 shows a rearward wash basin in a top view with a neck seal that is capable of being filled with water, as a third exemplary embodiment;

[0018]FIG. 8 shows the rearward wash basin in FIG. 7 in a side view, along a partial cut VIII-VIII according to FIG. 7;

[0019]FIG. 9 shows the neck seal in a detained view “Z” according to FIG. 8, and

[0020]FIG. 10 is an operational diagram for adjusting the neck seal with water.

[0021]FIG. 1 shows a rearward wash basin 1, which is typically outfitted with a shower hose 2, a mixer tap 3, and a drain 4, and has a neck cutout 5 for performing a rearward head or hair washing, whereby the area of neck cutouf 5 is lined with a flexible, fluid-tight neck seal 6. Neck seal 6 is equipped with a hollow chamber 7, whereby neck seal 6 is provided in the form of a bellows 8. Folds 9 have a curvature that essentially corresponds to that of the neck cutout 5. Bellows 8 is designed such that a central range of motion A of approximately 20 mm is possible, by means of which a tailored conformation to a customer's neck is ensured.

[0022]FIG. 2 shows, in a first exemplary embodiment, a neck seal 6 for the automatic adjustment of a fluid-tight fit against a customer's neck. Neck seal 6 has a hollow chamber 7 that is provided in the form of a bellows 8. Conformation to a customer's neck is enabled via the elasticity of bellows 8 (central displacement path A). To prevent the air from being compressed in bellows 8, which is closed per se, and/or neck seal 6, an air supply and relief opening B can be provided in a suitable (lower) location.

[0023]FIG. 3 shows a detained view X according to FIG. 2, and, in particular, a groove-like recess 11 in the area of neck cutout 5 of rearward wash basin 1, which serves to accommodate neck seal 6, whereby neck seal 6 is provided with a complementary recess profile 12 for this purpose, which clamps together with recess 11 in fixed fashion. The curvature of neck cutout 5 of recess 11 of rearward wash basin 1 must be sized greater than the curvature of neck cutout 5 of neck seal 6 such that a tailored fit against a customer's neck is enabled. This applies for all of the exemplary embodiments.

[0024]FIGS. 4 through 6 show a neck seal 6.1, in a second exemplary embodiment, whereby an air compressor 13, as an expansive displacement device 10, is interconnected with hollow chamber 7 via a combination air supply and release line 14 for the purpose of filling hollow chamber 7 with air to enable conformation (central displacement path A) to a customer's neck. A bellows 15 with an air release valve 16 can be provided as air compressor 13. A tailored fit is established by operating bellows 15. The fit is corrected and relaxed using air release valve 16.

[0025]FIG. 6 shows a detained view Y according to FIG. 5, which shows a better depiction of connection 26 of air supply and release line 14 with hollow chamber 7.

[0026]FIG. 7 shows, in a top view of rearward wash basin 1, a third exemplary embodiment of a neck seal 6.2, whereby hollow chamber 7—as an expansive displacement device 10.1—is provided with a combination water pressure line 19 and a relief line 20, which is connected to a pressure relief valve 21 (FIG. 8), for the purpose of filling hollow chamber 7 with water 18 at a selected temperature for conformation (central displacement path A) to a customer's neck. Water 18, which is held at a steady temperature, provides comfort in the form of a pleasant feeling of warmth at the customer's neck. Neck seal 6.2 is relieved of pressure manually using an operating device 22, by way of which excess water 18 flows from pressure relief valve 21 (FIG. 8) through a passage 23 into drain 4. A switching valve 25 (FIG. 10) is controlled using a switching device 24 to supply water to either shower hose 2 or neck seal 6.2.

[0027]FIG. 8 shows a partially cut side view of rearward wash basin 1 according to FIG. 7, which shows the position of relief line 20 and pressure relief valve 21 with passage 23 in greater detail.

[0028]FIG. 9 shows a detained view Z according to FIG. 8; it shows connection 26 of pressure relief line 20 with neck seal 6.2 and hollow chamber 7 in greater detail.

[0029] The bodies of neck seals 6, 6.1, 6.2, which are preferably made of silicone, and the connection with rearward wash basin 1 are the same in all exemplary embodiments.

[0030]FIG. 10 shows an operational diagram with the functions of the third exemplary embodiment according to FIGS. 7 through 9. A cold water line 27 and a warm water line 28 lead to mixer tap 3, with which a predetermined water temperature can be adjusted, which prevents a customer from feeling a cold sensation. Mixer tap 3 is interconnected with switching valve 25, which allows water 18 to be applied to either shower hose 2 or neck seal 6.2. Neck seal 6.2 is interconnected with pressure relief valve 21 via relief line 20, whereby excess water 18 flows into drain 4. In order to reduce the water pressure in hollow chamber 7 of neck seal 6.2, a pressure reducer 29 is provided that reduces water pressure from 2.5 to 6 kp/cm², to 0.5 to 0.8 kp/cm².

[0031] Description of the Function:

[0032] After a person's neck is placed in neck cutout 5, the temperature of the water is adjusted using mixer tap 3. The water is then directed into hollow chamber 7 using switching valve 25. Manual pressure is applied briefly to pressure relief valve 21 to relieve the pressure on neck seal 6.2 so it can then be filled with an amount of water that can be regulated using mixer tap 3. When optimum adaptation to the particular neck contour is achieved, switching valve 25 is switched over, and the water flows out of the tap of the shower hose 2. If the pressure becomes too great, the pressure relief valve 21 is operated briefly to relieve the pressure. The excess amount of water flows into drain 4.

[0033]1 List of Reference Numerals

[0034]2

[0035]1 Rearward wash basin

[0036]2 Shower hose

[0037]3 Mixer tap

[0038]4 Drain

[0039]5 Neck cutout

[0040]6, 6.1, 6.2 Neck seal

[0041]7 Hollow chamber

[0042]8 Bellows

[0043]9 Folds

[0044]10, 10.1 Expansive displacement device

[0045]11 Recess

[0046]12 Recess profile

[0047]13 Air compressor

[0048]14 Air supply and release line

[0049]15 Bellows

[0050]16 Air release valve

[0051]17 -

[0052]18 Water

[0053]19 Water pressure line

[0054]20 Relief line

[0055]21 Pressure relief valve

[0056]22 Operating device/pressure relief valve

[0057]23 Passage

[0058]24 Switching device

[0059]25 Switching valve

[0060]26 Connection

[0061]27 Cold water line

[0062]28 Warm water line

[0063]29 Pressure reducer

[0064] A Expansive motion range

[0065] B Air supply and relief opening

[0066]1 

What is claimed is:
 1. A rearward wash basin comprising a neck cutout for performing a rearward head or hair washing, whereby the area of the neck cutout is lined with a soft elastic neck seal, wherein the neck seal (6) has a hollow chamber (7) and is provided in the form of a bellows (8), and the folds (9) have a curvature that essentially corresponds to that of the neck cutout (5).
 2. The rearward wash basin as recited in claim 1, wherein the neck seal (6) is equipped with an expansive displacement device (10).
 3. The rearward wash basin as recited in claim 2, wherein an air compressor (13), as the expansive displacement device (10), is interconnected with the hollow chamber (7) using a combination air supply and release line (14).
 4. The rearward wash basin as recited in claim 3, wherein a bellows (15), as the air compressor (13), is equipped with an air release valve (16).
 5. The rearward wash basin as recited in claim 1, wherein the hollow chamber (7), as the expansive displacement device (10.1), is interconnected with a combination water pressure line (19) and a relief line (20), whereby a pressure relief valve (21) is associated with the relief line (20).
 6. The rearward wash basin as recited in claim 5, wherein the water pressure line (19) is equipped with a pressure reducer (29).
 7. The rearward wash basin as recited in claim 1, wherein the expansive displacement device (10, 10.1) is provided for an expansive motion range (A) of approximately 20 mm.
 8. The rearward wash basin as recited in claim 1, wherein the neck seal (6) is composed of silicone. 